Improvement in submerged pumps



UNITED STATES PATENT OFFICE.

H. M. STOKER, OF WATSON, ILLINOIS.

IMPROVEMENT IN SUBMER'GED PUMPS.

Specification forming part of Letters Patent No. 48,220, dated June 13, 1865.

section. Fig. 2 is a horizontal section of the cylinder.

Similar letters of reference indicate like parts.

- This invention relates tothat class of' submerged pumps the upper ends of whose cylinders are open, so that the water rests always upon the upper heads ofy the pistons.

A is the pump-cylinder and water-chamber, made ot' potters ware, molded in one piece, with a ange around its whole lower part, for the purpose of connecting it to the metallic Valve-chamber B, which has a like ilange on its upper part. The cylinder has two pistonchambers, l 3, and a central chamber, 2, the latter being connected with the pump-stock I. The pump-stock carries near its highest part a crank wheel and shaft, H, and crank Gr,which operate the pump through a pitman, K, and walking-beam F.

J J are piston-rods, carrying each a piston, C, the ends of the piston-rods being pivoted to the ends of the walking-beam.

The valve-chamber is of the same diameter and shape as the cylinder A, and it has valveopenings through its bottom beneath the piston-chambers l 3, to which are fitted valves D, opening inward. The central portion of the valve-chamber is divided from the side portions by narrow openings, which are closed in alternation by a ball check-valve, E, made of rubber. The piston-chambers may be lined with metal, as here shown, it' it is desired to strengthen the cylinder.

The operation of the pump is as follows: When the walking-beam is oscillatedone of the piston-rods J will be moved upward, andl its chamber will be thereby filled with water, the check-valve being also caused to roll toward that one of its seats which is nearest the ascending piston. When the same piston is forced downward the valveD below it will be shut and the water in that piston-chamber will press against the check-valve and roll it against its opposite seat, and thereby allow the water to reach the central chamber, 2. During this last movement the other piston has ascended and its chamber has been lilled with water.`

When the last-mentioned piston descends the water in its chamber is in like manner forced into the central chamber, 2. The continuation ot'l these operations will till the pump-stock, so that the water will be discharged from its spout in the usual manner. n A pump made in this way answers the conditions of cheapness, simplicity, immunity from the attacks of frost, and it never requires priming in order to make its pistons work effectively.

I claim as new and desire to secure by Letters Patent- In double-acting submerged pumps with uncovered piston-chambers, making the body or shell ot' the cylinder of' potters ware, molded in one piece, combined with a valve-chamber,

`B, of metal, constructed and arranged substantially as described.

H. M. STOKER.

Witnesses:

J oHN T. GARMAN, J osIAH T. SMITH. 

